In experiments, an injection of cytoplasm from dextral eggs changes the pattern of sinistral eggs, but an injection from sinistral eggs does not influence dextral eggs.

• 在实验中,用取自右旋卵子的细胞质进行的注射,可改变左旋卵子的模式;用取自左旋卵子的细胞质进行的注射却不能影响到右旋卵子。